﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using CLEX.Client.Metro.View.Home;
using CLEX.Client.Metro.View.Lattice;
using CLEX.Client.Metro.View.Login;
using CLEX.Client.Metro.ViewModel.Home;
using CLEX.Client.Metro.ViewModel.Lattice;
using CLEX.Client.Metro.ViewModel.Login;
using CLEX.Service.DataContracts;
using CLEX.Service.Proxies;
using CLEX.Service.ServiceContracts;
using Windows.ApplicationModel;
using Windows.ApplicationModel.Activation;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Popups;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227

namespace CLEX.Client.Metro
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    sealed partial class App : Application, INavigator
    {
        private readonly IClientCache clientCache;
        private readonly IFacade facade;

        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App()
        {
            this.InitializeComponent();
            this.Suspending += OnSuspending;

#if AZURE
            this.clientCache = new ClientCache(new ClientService("http://clexa.cloudapp.net/ClientService.svc"));
#else
            this.clientCache = new ClientCache(new ClientService("http://localhost:58309/ClientService.svc"));
#endif
            this.facade = new Facade(clientCache, this);
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="args">Details about the launch request and process.</param>
        protected override void OnLaunched(LaunchActivatedEventArgs args)
        {
            Frame rootFrame = Window.Current.Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if (rootFrame == null)
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame();

                if (args.PreviousExecutionState == ApplicationExecutionState.Terminated)
                {
                    //TODO: Load state from previously suspended application
                }

                // Place the frame in the current Window
                Window.Current.Content = rootFrame;
            }

            if (rootFrame.Content == null)
            {
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                GoToLogin();
                //if (!rootFrame.Navigate(typeof(MainPage), args.Arguments))
                //{
                //    throw new Exception("Failed to create initial page");
                //}
            }
            // Ensure the current window is active
            Window.Current.Activate();
        }

        /// <summary>
        /// Invoked when application execution is being suspended.  Application state is saved
        /// without knowing whether the application will be terminated or resumed with the contents
        /// of memory still intact.
        /// </summary>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private void OnSuspending(object sender, SuspendingEventArgs e)
        {
            var deferral = e.SuspendingOperation.GetDeferral();
            //TODO: Save application state and stop any background activity
            deferral.Complete();
        }

        public void GoToLogin()
        {
            Frame rootFrame = (Frame)Window.Current.Content;
            rootFrame.Navigate(typeof(LoginView), new LoginVM(facade));
        }

        public void GoToHome(UserData user)
        {
            Frame rootFrame = (Frame)Window.Current.Content;
            rootFrame.Navigate(typeof(HomeView), new HomeVM(facade, user));
        }

        public void GoToLattice(UserData user, DatabaseData database, TableData table)
        {
            Frame rootFrame = (Frame)Window.Current.Content;
            rootFrame.Navigate(typeof(LatticeView), new LatticeVM(facade, user, database, table, new LatticeState()));
        }

        public void ShowLogout()
        {
            LogoutView view = new LogoutView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new LogoutVM(facade, new PopupService(popup));
            popup.IsOpen = true;
        }

        public void ShowDatabaseNew(UserData user)
        {
            DatabaseNewView view = new DatabaseNewView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new DatabaseNewVM(facade, new PopupService(popup), user);
            popup.IsOpen = true;
        }

        public void ShowDatabaseDelete(DatabaseData database)
        {
            DatabaseDeleteView view = new DatabaseDeleteView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new DatabaseDeleteVM(facade, new PopupService(popup), database);
            popup.IsOpen = true;
        }

        public void ShowDatabaseEdit(DatabaseData database)
        {
            DatabaseEditView view = new DatabaseEditView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new DatabaseEditVM(facade, new PopupService(popup), database);
            popup.IsOpen = true;
        }

        public void ShowChangePassword(UserData user)
        {
            ChangePasswordView view = new ChangePasswordView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new ChangePasswordVM(facade, new PopupService(popup), user);
            popup.IsOpen = true;
        }

        public void ShowTableList(UserData user, DatabaseData database)
        {
            TableListView view = new TableListView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new TableListVM(facade, new PopupService(popup), user, database);
            popup.IsOpen = true;
        }

        public void ShowLatticeEdit(TableData table, LatticeState state)
        {
            LatticeEditView view = new LatticeEditView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new LatticeEditVM(facade, new PopupService(popup), table, state);
            popup.IsOpen = true;
        }

        public void ShowHistogramDelete(LatticeState state, AggregateData aggregate)
        {
            HistogramDeleteView view = new HistogramDeleteView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new HistogramDeleteVM(new PopupService(popup), state, aggregate);
            popup.IsOpen = true;
        }

        public void ShowHistogramNew(TableData table, LatticeState state)
        {
            HistogramNewView view = new HistogramNewView();
            Popup popup = new Popup();
            popup.Child = view;
            view.DataContext = new HistogramNewVM(new PopupService(popup), table, state);
            popup.IsOpen = true;
        }

        public async void ShowUnexpectedError(string errorMessage, string details)
        {
            MessageDialog dialog = new MessageDialog(errorMessage + (string.IsNullOrWhiteSpace(details) ? "" : "\nDetails: " + details), "Unexpected error");
            await dialog.ShowAsync();
        }
    }
}
